Connect with us

microwave oven - beeper too loud

Discussion in 'Electronic Repair' started by Robert Whipple, Jul 24, 2005.

Scroll to continue with content
  1. Is ther any way to tone down the volume?
     
  2. Guest

    Tape some squeezably soft Charmin toilet tissue over the hole in the
    peizo buzzer. <lol>

    Actually, just find the peizo buzzer. If it is not one that has the
    adjustable top on it to close off the hole, get some sticky back loose
    rubber foam and stick it over the hole. DO NOT completely block off the
    outlet to the buzzer as it will over time damage the peizo element.
     
  3. Huh?

    --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
    Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
    +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
    | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

    Note: These links are hopefully temporary until we can sort out the excessive
    traffic on Repairfaq.org.

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name is included in the subject line. Or, you can
    contact me via the Feedback Form in the FAQs.
     
  4. Seafarer

    Seafarer Guest

    Same for me!
    [email protected] Services[UK]
     
  5. Guest

    Huh? What?
     
  6. NSM

    NSM Guest

    That's extremely unlikely to damage anything - unless you touch the HV
    capacitor.

    N
     
  7. Guest

    Actually, a peizo buzzer can be damaged if the hole for the sound is
    completely blocked off. Over time the peizo element will crack from
    the excessive resonance inside the peizo housing and simply stop
    working. I have seen this personally too many times when nurses will
    completely tape over the alarm ports on piezo buzzers instead of using
    the volume control properly.
     
  8. James Sweet

    James Sweet Guest

    How will it damage it? I've been sticking a piece of scotch tape over the
    piezo speaker in PC's to make it quieter for at least a decade, never had
    one fail in any way and it makes it much quieter.
     
  9. Guest

    Completely blocking off the output messes up the resonance of the
    housing, this can cause excessive vibration of the piezo element and it
    can crack. Obviously scotch tape still vibrates and passes the sound
    out, it is not a complete block of the sound outlet.

    We have even received a service bulletin from one particular medical
    device manufacture due to the high failure of the peizo buzzers and the
    cause being the nurses putting the thick tape over the buzzer hold
    because it was too loud for them, completely blocking off the hole.
    Not to mention the fact that the nurse was in effect tampering with a
    patient safety alarm in the first place, what they did would eventually
    completely disable the alarm putting the patient at even greater risk.
     
  10. NSM

    NSM Guest

    Damn those annoying heart rate monitors!

    N
     
  11. Jonathan

    Jonathan Guest

    I'd believe that, peizo is a type of crystal after all which would be rather
    brittle. I'd imagine like microwaves, medical gear would have a high
    frequency tone unlike a PC speaker which is usually a bit lower, and
    certainly not a constant tone, unless you have a really old PC and play 4
    colour DOS based games on it :)

    JD
     
  12. Stan

    Stan Guest

    }Actually, a peizo buzzer can be damaged if the hole for the sound is
    }completely blocked off. Over time the peizo element will crack from
    }the excessive resonance inside the peizo housing and simply stop
    }working.

    Boy, you learn something new every day. Perhaps the makers of these
    heart monitors should make it easier to adjust the sound...perhaps
    add the ability to download "ring-tones"...("Another One Bites the Dust",
    by Queen)

    Stan.
     
  13. What piezo speaker inside a PC?

    --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
    Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
    +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
    | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

    Note: These links are hopefully temporary until we can sort out the excessive
    traffic on Repairfaq.org.

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name is included in the subject line. Or, you can
    contact me via the Feedback Form in the FAQs.
     
  14. Adam Sampson

    Adam Sampson Guest

    Not entirely implausible -- I've encountered a couple of machines with
    piezo transducers on the motherboard instead of the regular little
    speaker that most machines have. One of them had a speaker as well for
    no obvious reason, and I was most annoyed to find that removing the
    speaker didn't stop it beeping on power-up...

    I've also seen a Promise RAID controller (an SX-6000, I think?) that
    had a piezo beeper on the PCI card. Since it beeped every couple of
    seconds whenever it was checking or rebuilding the array (which could
    take several hours), it fairly quickly got a blob of Blu-Tak wedged
    over it to make it a bit quieter.
     
  15. James Sweet

    James Sweet Guest


    90% of the motherboards I've come across in the last decade have a piezo
    speaker soldered to them rather than needing to plug in that paper cone
    speaker on the case. It's only used for beep codes these days anyway.
     
  16. I suppose that since the PC "speaker" has little function in most systems,
    going to a piezo beeper would be a reasonable cost savings.
    And I do suppose you will be really upset if as some others have said,
    the thing might be damaged. :)

    --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
    Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/
    +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm
    | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html

    Note: These links are hopefully temporary until we can sort out the excessive
    traffic on Repairfaq.org.

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name is included in the subject line. Or, you can
    contact me via the Feedback Form in the FAQs.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-